CVE-2017-16877: Next Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-3f5c-4qxj-vmpf
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CVSS 7.5
CWE-22
Published
Advisory Summary

CVE-2017-16877 is a HIGH (CVSS 7.5) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Next libraries in the npm ecosystem. The issue involves next.js directory traversal vulnerability. Remediation is available by upgrading affected packages to version 2.4.1.

CVE-2017-16877 at a Glance

CVE Identifier CVE-2017-16877
GHSA Identifier GHSA-3f5c-4qxj-vmpf
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Next
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2017-16877

To remediate this vulnerability, upgrade all affected Next dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

next fixed: 2.4.1 
npm install next@2.4.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls next

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2017-16877, inspect your project dependencies using npm:

npm ls next

Analyze the terminal output to locate any version of Next in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.4.1), your application is affected.

Note: The npm ls next command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Next, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Next.js before 2.4.1 has directory traversal under the `/_next` and `/static` request namespace, allowing attackers to obtain sensitive information.

CVE-2017-16877 Affected Next Versions

1 component(s)
Fixed Versions:
2.4.1
Product / Package Ecosystem Affected Versions Fixed Version
next
npm/next
npm
≥ 1.0.0
< 2.4.1
2.4.1

References

NVD — CVE-2017-16877 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-16877
Security Fix Commit FIX COMMIT
https://github.com/vercel/next.js/commit/02fe7cf63f6265d73bdaf8bc50a4f2fb539dcd00
Next Source Repository REPOSITORY
https://github.com/zeit/next.js
Next Release RELEASE
https://github.com/zeit/next.js/releases/tag/2.4.1

Frequently Asked Questions

What is CVE-2017-16877?
CVE-2017-16877 is a security vulnerability in Next involving Next.js Directory Traversal Vulnerability under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Next versions are affected?
Affected versions include releases prior to 2.4.1 across affected packages: next.
What version fixes CVE-2017-16877?
Upgrading to 2.4.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is next affected?
Yes, next is affected in releases prior to 2.4.1. Upgrade your dependency to 2.4.1 or later.
What is the CVSS score of CVE-2017-16877?
CVE-2017-16877 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2017-16877?
CVE-2017-16877 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check npm dependencies for CVE-2017-16877?
Run the dependency tree command: 'npm ls next'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3f5c-4qxj-vmpf",
  "modified" : "2024-04-22T19:49:35Z",
  "published" : "2017-12-05T02:04:14Z",
  "aliases" : [ "CVE-2017-16877" ],
  "summary" : "Next.js Directory Traversal Vulnerability",
  "details" : "Next.js before 2.4.1 has directory traversal under the `/_next` and `/static` request namespace, allowing attackers to obtain sensitive information.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "next"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0"
      }, {
        "fixed" : "2.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-16877"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/commit/02fe7cf63f6265d73bdaf8bc50a4f2fb539dcd00"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/zeit/next.js"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zeit/next.js/releases/tag/2.4.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T20:54:56Z",
    "nvd_published_at" : "2017-11-17T17:29:00Z"
  }
}